Fastening apparatus



ug-v 5, 1947 w. E. DE wALD 2,425,031

FASTENING .'.1=1=ARATUsl Original Filed Oct. 16, 1941 2 Sheets-Sheet lAugq, 1947. i w, E. DE WALD 2,425,031

FASTENING APPARATUS Original Filed Oct; 16, 1941 2 Sheets-Sheet 2INVENTOR .MK//l/am eWa/d.

Patented Aug. 5, 1947 JNEF'EEBF STATES? PATE-NYI" FASTENIN G APPARATUSWilliam \E.D.e.-Wald Chicago, vlIll Original application@ ctober-rl;1941;.. SerialNm. L5115;]68-:1 Dividedland this applicationxAprilrlg;I9;4.4;Serial Noa 529,053

4ciaims. (ci. 21a-21r- This invention relates@ to apparatus forproducinga button and fastening uni-t.. As-iswell known,-y whenbuttonsare-sewedonto clothing orl other articles requiringfbuttons by alneedle, and. thread,- the operationisznotonlytime-consuini-ngl bntinarelatlvely; short time :the button-.thus-- This applicationfis;aedivisionrofszmyv. copend'ng-z. Y

application SerialiNo. 415,168'. filed Octoberl 16," 1941, nowPatent-No..2,346,2G9 grantedApril 11,. 1944*.;

Among v the obj ectsfoffitherpreseni; invent-ionjs tov eliminate theobjections andi-carryiout .the i111- tended purposes referredto above.

Anotherl Objectis to providemeans for enabling.- thetWist-ingcf thewirelfor ffasteningthe button` onto: thev cloth or .the. .like,.v by:hand-bythe use:

merelyof atwisting tool held lfreelyin: the hand.

A further object is tonprovide:a.-novelarrange ment .and assembly. ofclothgr. button and= wire-to enable easy and `quickl twisting of- 'therwire to secure the. button tothe cloth.V

A.\sti1l further -objectI is :to` providey af simple-- convenientmachinefor twisting said wire.

Another object is' the-provision ofmeans for covering the-nishedfftwisted wire tohide the same fromsighty and prevent-the.y samefrom scratching or `injuringgthe:skin-of the wearerl of the garment onwhichlthefbu-tton is secured.

A further object is to provide novel-meansv for 1 spacing -the `buttonfrom-the -cloth` during" the fastening operation.

A still further object-is rthe provi-sion of afperi` forated headoreyeletlthrough whichfthe legs of wire staples'are passed after--passing through the and tapered inwardly'and upwardly to facilitateADessins .0f` the stapleglees upwardly; through the @valetppeninerandgspread..said. lees in. crossed.

sted

2. relation `t`o..space. their free .ends apartto' enable them to beeasily frther spread by the'lingers"` ofthe operator to position them tobereceived' by. the notches off thetwisting head,

Another object is the provision of a nove1'y twistinghead that may.be-.formed on the .endof the twisting shaft for smallv buttons,and'formed to. enable` ar larger head. tov be. detachably securedthereto, when desired; forlstrger buttons.

Aiurther4 object isth'e provision ofv a.. novel" stationary. holding.head." formed 'i to. receive; the wire or wiresA on the outerface of`the..button, and.. to hold thef. button stationary dringtheitwistingoperation..

Astilrfurther object .is ,toprovlde novelstaples or bent wires of`suchshape as to facilitate the.' buttonfastening. operation, and improve.the appearance of Yth'eiii'iislfi'ed product..`

Other obiects, advantages and. vcapabilities inherently possessedebylmy. invention will.. latermore fully appear.

My invention` further residesyin .tle.combina tion,v. construction..and. arrangement of` partsillustrated` `infthefA accompanyingdrawings,v` and while vI /haveshown thereine preferredw embodif. ments,I wish it understood that the same isisus-` ceptible ofmodiflcation-.andwchange without-departinggfromthespirit.ofmy`invention.

Infthe drawings-:-

Figure 1 is a perspective View showingftherparts infslightly spacedapart positionl tozbetter.- lillustra-tezgthelrelationofgthefparts.:toeachv other prior toxbeing; pushedtogethenand'priortothe twisting'.l oneratiom. and in whichthetztwisting' head'and itsoperating-parts; areffre'elyl held :in i thefh'and. ifoir. a handtwisting.,operation.

Figa 2f`fis a :,perspectivefview of a nia-chine for?" performingthetwistingoperation Fig.: 3 lis; a :longitudinal vertical section'through' a. median planel vof the machine-shown in ligtfgW andshowing-- a 'butto'n havingA been:Y lfastened to a piece-tof 1supporting rmaterial.V

Fignlwis'a"perspective view'of oneiorm 'ofstai` tionaryff head forholding "the l-button removably mountable' inthe Vlower 'portion 2 ofthermachine shownfin'FigsZ, Y'3,ff'll, 12,*14 and-15f liligs'l is aperspective view-'tof aistaple of'wii'e" to -be pushed rst`thr0ughtwo'holes in the brit-"t tonina buttonv 'havingiur holes.

Fig. 6"isaiview'similar'v to Fig: 5- butshowing'a" staplewhoseclosi-:ldendl willcross 'over the closed endof-the-rstsstaple;thestaples of Figs. 5 and* 6"; having revers e`A crimpse'to' 'intert when"pushe'oll through'th'e'.holes'iofthebutton.'

Fig. 7 is a perspective view of a spacer to be positioned between thebutton and the cloth.

Fig. 8 is a perspective view of a head or eyelet through and againstwhich the Wire is twisted.

Fig. 9 is a perspective view of the edge of the button, the cloth andthe head or eyelet, after the wire has been twisted, the head or eyelethav.- ing an extension shown open before bending it over the twist tohide the twisted wire.

Fig. 10 is a view similar to Fig. 9 but after the extension of the heador eyelet has been lbent over the twisted wire to hide the same.

Fig. 11 is a perspective view of another form of machine for carryingout my invention.

Fig. 12 is a perspective view of the machine of Fig. 11, but in apartially open position.

Fig. 13 is a vertical transverse section of a stationary head forholding the button and closed ends of the wire staples. Y

Fig. 14 is a side elevation of a further modification of a machine forcarrying out my invention.

Fig. 15 is a side elevation of a still further modification of a machinefor carrying out my invention.

Fig. 16 is a perspective view of a further form of twisting head.

Fig. 17 is a perspective view of a further modified form of twistinghead.

Fig. 18 is an end view of a twisting shaft showing the twisting head foruse on a small button.

Fig. 19 is a fragmentary side elevation of the lower end of a twistingshaft of the type shown in Fig. 18, and showing in vertical crosssection an extension screwe'd thereonto to operate on a larger button.

Fig. 20 is a plan view of a button showing the wire staples being passedthrough the holes of the button in parallel or side-by-side relationinstead of having their heads or closed ends crossed one over the other.

Fig. 21 shows a section through a button and an eyelet, and a staplebeing passed therethrough and showing how the legs of the wire staplecross each other` as they pass through the hole of the eyelet.

" Fig. 22 is a section through a button, spacer,

cloth and eyelet, and showing one or more wire staples twisted intofinal position to secure these parlts together. Referring moreparticularly to the drawings, have shown in Fig. 1 a button I, spacer 2,cloth 3, head or eyelet 4, and twisting head 5 slightly spaced apartfrom each other, with a pair of wire staples 6 and I passed through thebutton holes, spacer, cloth and head or eyelet, and the free and of thestaples in position in the slots in the twisting head, but before theseparts have been pressed together to their intended positions. Theseparts are shown in final position in Fig. 9, after the twisting has beencompleted but before the integral tab or extension 8 of the head oreyelet 4 has been bent over the twisted ends of the wire to hide thesame. Fig. 10 shows the tab or extension 8 after it has thus been bentover to hide the twisted wire. If desired, the tab or extension 8 mayhave a snap flange 9 formed on its free end to snap into gripping andfastening engagement with the adjacent edge of the head or eyelet 4after being bent thereover.

As will be understood, the parts shown separated in Fig. 1 will bepushed together so that the button engages the spacer, the spacerengages the cloth and the cloth engages the head or eyelet, the freeends of the two wires staples being then bent laterally by hand* and'positioned roughly to extend one into each of the four notches f of thetwisting head and extending laterally outwardly therefrom. Theprojections Hf defining the side walls of said notches are each undercuton each side as shown at I2 so that as the twisting head is rotated ineither direction the undercut faces I2 will act to retain the wireswithin the notches I0 as the twisting proceeds. As seen in Fig. 1, thetwisting head 5 extends upwardly in the form of a shaft or stem I3,having fixed at its upper end a disk-like handle I4 which during thetwisting operation may be grasped within the palm of the hand andpressed downward to keep the various parts together and retain the wirewithin the notches I0. As the twisting proceeds the Wires will betwisted both above and below the head or eyelet 4 until the wire abovethe head or eyelet assumes the twisted shape shown in Figs. 9 and 22.

During the twisting operation when twisting freely by hand the buttonmay be placed against the top face of the stationary head I5 which isformed withangular notches I6 so arranged as to receive the crossedclosed ends of the wire. staples 6 and I to hold the button againsttrgnf, ning, or the button may be held against tttgni'ng by hand ifdesired. It will be understqtifthat. the twisting head s and twistingngtphs Inj therein may be of various shapes, two. ofV which, furthershapes are shown in Figs.V 1i-f and l'l.,L As soon as the twisting ofthe wires has been,` completed as seen in Fig. 9, the'extension tab, 8of the head or eyelet 4 will: be bent over the.` twisted wires andpressed against the head op.' eyelet and secured in place thereon by thesnap., flange 9 as seen in Figjl, thus completing the2 securing of thebuttonto the cloth, whenv done.2 manually. As seenl in Figs. 5 and 6;`thev wires, forming the legs of: the staples 6 anat l may be, roughened,if desired; as shown at I1, to fargli?. tate the wire legs gripping eachother during twisting and thus prevent them from slipping with relationto each other. The @ylt 4 may be positioned with either side out, but itis pre ferred to place it so that the. ooncavity is toward the button,see Figs. l., 9 and 21.

Instead of making the twist by holding the twisting means freely in thehand and pressing toward the button, the twisting may be done bymounting the twisting means in a form of apparatus shown in Figs. 2, 3,11, 12, 14, and 15, thusgiving a more positive and controllable operan..tion. In the form of apparatus shown in 2 and 3, the twisting deviceshown in Fig. l may be mounted in the upper swingable arm i3, niv-.otally connected at I9 to the stationary base 2Q, provided with theupstanding, angulaly extend4 ing socket portion 2| adapted to removablyireceive the stationary head I5, or any other sta.`

tionary head formed with any other arrange-, ment andgform of crossslots as desired. In the, form shown in Figs. 2 and 3 the upper andlower members I8 and 20 are made of sheet met@ pressed by dies or thelike into the shape shownl with the bottom lip 22 (see Fig. 3) slittedat its,- sides and bent forwardly and fastened to the front wall of thesocket portion 2| in any des sirable manner as by welding, brazing,rivetingL bolting or the like, in order to form a rigid bot tom toreceive and rmly hold the bottom of the stationary head I5. Preferably,the cross Seg tion of the stationary head I5 and the socket removablyreceiving the same, will be nonncir: cular in order to prevent this headfrom rotat: ing during the twisting operation, and permit 'the 7"to beremoved and another ferie inserted when desired.

V'IE'lce forward end of the upper arm .IB is {fori-ned with a hollowVportieri 23 'having .its `upper l.face an opening 24 -to rotatablyreceive the shaft or stem 13 carrying on l'its lower end .the twistinghead 5, and Ion .its upper .end the .handle :I4 .for rotating-the stemand twisting head. In Aorder -to :giveample clearance for .the-operatorsilngers 'between this '.-handle and the upper face of the .arm I3 lthe-stern AI3 is formed with :an .enlarged portion to provide .the shoulder.26m/lush is of larger diameter :than :the opening 24 to :form -astop'to prevent -furtherdownward movement I.of `the `stem ibut yet:permit :a limited-.upward move ment.

The upper arm |58 ata position .slightly .fon- -ward lof A'the'pivot SIB`.is formed :with a .protruding pin 2'I against which bears .'thefree:end .of `the Ileaf spring :'28, :secured I:by rivets or the alike 29.to the lower .or 'ibase --member :L20 Iand so ar.- i-anged vas-tonormally .urge .the .upper arm 1 8 to v-move in aclockwisedireotion.asviewed in "Rigs, '2-*and`3 when .closed-iin-.ordertocause .-.anm I8 to swing xto .open position, :when released, -read-yto v--receive the cloth, button .-and parts foroperatien upon anotherbutton. To permit the ..upperiarm .118 yto '-be 'held' with .someTpressure ,against the 1wire, eyelet land cloth -for .a `twistingoperation, '-I .haveprovided a-swingable'springyoke 30, pivfo'ted-onboth :sides offthe'base member at 3l, and

having at .:both sides ;upst anding Vspring :wires 32 formed-withvoneiortmore .coils-33 to permit spring action Whenidistorted. 'When-the.upper arm lf3 iSswung-.forward into zposition for aftwistingop-`eration and the .outer :or .upper jbar .of l:the x-yoke 3B -pushedbetween -the .upstanding lugs 3d the coil-33zwill be distorted so astoprovide suflcient pressure Iagainst ithe button assembly L'between theystationary head t5 -and .the :twisting :head '5.

to enable the required twisting .merelygby rotating .the handle .If'IL1.1i' additional Apressure =is `clesiredfthelsamev may beproduced-fbymerely :push- -ing downwardly the .desired iamount with .thehand `.upon fthe :handle sld. When the twisting .operation is :completed-the vyoke ;3;;may abe released by Vpulling it orciblyout :from ,betweenthe lugs .34', 4.whereupon the "leaf spring 28 y,will --:swing .thewuppel farm I8 :rearwardly ;to;a zsufli- `ciently open Y.position l.to:give ,zdesiredgiclearance tofenable ,assembling :ofthe parts for -thenext operation. P:How lthe twisting Ioperation is effect-ed in-.fthe:apparatus otFigs. 2*,-and 3 -will be .clear froman inspectionfof :Fig1it beingunderstood: that. when theA spaced; apartpartsyofgEig. :arepressedztogetherf longitudinally of the axis :ot-twisting .and the-.endsAof the 4wiresprotrude laterally. outward ffrom :the undercut notchesIt, a =rotation voif'fthe vhandle IA rwill :twist .the :wires-rtogetheri-bothabove ;and below-fthe eyelet 4 Vduring whichV twisting.operationtheends.- of thegwires --will be =pulled :radially inwardly:through the 1notches |10.-untilt-hetwist:shownA in; Fig. 9; isgcom-.pleted, this ftwiste'd end `being as ubstantially `-smooth .andVdome-.shaped` ('Eigs. 1:9 .-,and 'L2-2) lby :reason of the.-domeshapeof the IQeSs-QE the center of the faceoffthentwistngface .asgseenin*.Figsi l3, and 14. This; also .presses,.the free-engl of Lthe.stapl'eflegs `into contact :with :the eyeletand .prevents-@them vfromstanding y.ont to catch .into :the -fcloth -ofgthe clothing.

'IngEia .2r-the:Springfyoke :shown as; removed-from.engagementbetweenthalues .and before:the upper .arm Iii-.nas Asy/une,:rearvvardiyv Yfen11u5.111,1@atwe purposes. It will be understood, however, thatvunless held downwardly by the operatorie hand when vspring lyoke 311 isreleased, thenpper 428 will move .rearwardly the end. 35 Strikes thebottom .plate of :the base l20 orderlto open the jaws a -suiicientAdistance .to permit ,free vmove..- ment therebetween in .assembling.the next button and `associated part-s. Also in Fig. 3 the -jaws' .arefor illustrative purposes .shown a slight .distance open, .-but itshould tbe understood that when spring -yoke 3:0 :is betweenlugs r34`and :theupner Aarm I8 is not held .back by the .operators hand, thejaws -will close .and sufficient. pressure abe ex- .erted .upon thebutton yassembly to, enable @the twisting operation.

The .spacer 2 may be made .of -qany desired `:material .such Aas rubber,plastics, ,lg-lasst zwod, metal or the like. Also .the head or eyelet Amay 'be turned with .either side :up .as stated above, `and the .tab .or:extension -8 may 'be omitted desired as :seen :in Figs. 2l and'22. Itfshould'ibe understood that any color .of wires may abe fused 4tovharmonize .with any :color of cloth the-button .may be secured to.

ln `Figs. 11 .and l2 are .shown 1an apparatus .=in which my .twistingdevice is. mounted, this :appar ratus comprising gene-rally the "-basefportion i311 and the-upper .arm -38 for-ined at its'forward :end with.a hollow .head 39 (1in Fig. all) Aformed'at/its .upper .side with an`opening All fto .receive fthe shaft Q42, which .shaft Ais provided atfitsrupper end .with `an .enlargement d'3 -just below -thediskelikefhan- 'die 44 for similar purposes-to those described sinconnection with Figs. ky2 .and 3. The right-'hand end of the .upper arm'38 y,as viewed in Figs; 1'1

- .and l2 .extends downwardly .and is fprovidedwith .a 4non-.circularVportion .'45 .of vsuch .size as .to slidably .t -into 'the upstandingcorrespondingly shaped socket 4'6 .of lthe'base-portionTf1, so .thatwhen the `upper .arm :38 is vmoved downwardly non-circular portion 45rwill befseated .socket portion #It and prevent the forward .end .of armA38 from moving laterally. @Formed below noncircular portion 45 Ais acylindrical Aportioniil, so that when the upper armlis moved upwardlylal suiiicient distance the cylindrical portion .41 will 4permit the upperarm to be swunglaterally-to move i-t .way from :the lower stationaryhead fk5, which stationary head .-as in `lligs. r2 and z3 4.is re-:moi/ably mounted :in fa .correspondingly shaped socket .which isindicated .in Figs. -11 and' .i2-at -2-|-'.

The shaft 42 extends downwardlylthroughthe nouow vhead 39 and is `formedat its lower -nd with a twisting head 148 formed at its bottom face witha rsuit-able number (preije'rably four) -of notches '49, -.-th e reV.being on the leading vlower edge of each ofsuch notches la lforward lyextend- Ving projection vEll, `the purpose of whichvis vto `readily.pick up the adjacent wire and' yguide it into the notch at ganebeginning of the twisting operation. {It is understoolthat theendsvof'the wires .before the twistingheadis applied theretowllberough1yspread into their approximate ly correct ypositions .t0 "bepickedV up iby the .-D'rc actions ofthe .twisting r.head .and guidedintothe twisting notches at ,thebeeinninebfthe.twisting operation. .Inthe form of .anparatussnownin Fig. 11o, the pressure `exerted..downwardly wie" cilitate .the .twisting operation is applied bytheoperator with the pressure of his hand down wardly upon theupper-arm,38. Qtherwise than Ias pointed out, the twisting operationmisveiliected .the same ,general yrnanicer as thatfdesribfd.abovefinnnectonwithFiss. Zand?. Fig- 12 the arm 38 is shownas beingpfspringy mate-4 rial that when pushed downwardly sufficient bending willoccur to urge the twisting head to its work' and hold it there duringits operation.

In Fig. 13 is shown in vertical transverse section one form ofstationary head for receiving and holding against movement the closedends of the staples and 1, which wires pass into the notches when thebutton is positioned over the stationaiir head. 'Ihis view is taken on avertical plane passing through one of the notches i6 in the stationaryhead I5 of Fig. 4. As will -be understood, various forms andarrangements of notches in the stationary head may be employed asdesired.

Fig. 14 shows another form of apparatus in which the pressure is appliedupon the button assembly by rotating the handle 5i which rotates thethreaded stem 52 and lby means of the threads thereon moves the stemdownwardly into contact with the button assembly and with the desiredamount of pressure. When the desired amount of pressure has beenapplied, rotation of the handle 5l is stopped and the twisting head 53,which then presses agaimt the wires, is rotated manually by means of thewings 54, this twisting head being freely rotatable on the extended pin55 which is formed with a Acircumferential groove to receive a pin P xedin the twisting head to permit the twisting head from falling away fromthe stem 52 but yet prevent free rotation thereon. As will be understoodin Fig. 14, a suitable frame 51 is provided having a base portion 58formed with a socket portion 59 to receive the stationary head B0 forsimilar purposes as those pointed out above in the preceding views. InFig. 15 is provided a frame 6I having a base B2 and a socket forreceiving the stationary head 63, while at the upper end it is formedwith a hole 64 through which is rotatably mounted the stern 55 which issmooth and unthreaded. In operating this 'form of apparatus the handle6G is manually raised to permit entry of the cloth and button assembly,after which the handle 56 and stem 55 is pushed downwardly to causeengagement with the wires of the twisting head 48 formed at the lowerend of the stem and of similar formation to that described above inconnection with Figs. l1 and 16. When the twisting head is in engagementwith the wires a slight pressure downward is exerted on the handle 66,which is then rotated a suitable number of times and the twistingeffected in the manner described earlier herein.

Fig. 17 shows the form of twisting head illustrated in the apparatus ofFig. 14, and which operates as described in connection with Fig. 14.

In Fig. 18 is shown a twisting stem 61 which at its lower end is formedwith a series of twisting notches 68 similar in general to thosedescribed above, the twisting head (which may be the bottom of a stem ifdesired) being of small diameter for producing a twisting operation uponbuttons of a small diameter. This form may also be used for fasteningbuttons to cloth or the like with a head or eyelet of small diameter,which because oi its small diameter will enable the elimination of thespacer. The exterior lower end of the shaft 59 carrying the twistinghead 61 may be formed with threads, and an additional twisting head 'lllof larger diameter screwed thereon, as shown in Fig. 19, when it isdesired to convert the small twisting head o Fig. 18 into a larger onebut still using some of the parts.

As shown in Fig. 20, the wire staples may be inserted into the holes inthe button in a parallel 0r Side-by-side relation if desired, instead of`(,:riss-cross as shown in Fig. 1.

As shown in Fig. 21, the diameter of the opening in the eyelet issmaller than the distance between the holes in the button, and the wallof the eyelet facing the button tapers upwardly and inwardly, so thatwhen the staple legs are inserted through the hole in the eyelet thelegs will be crossed and spread outwardly to facilitate more easilybending them by hand outwardly roughly into position to enter thenotches in the twisting head. In Fig. 22, the twisting is shown ashaving been completed and the wire twisted both above and below theeyelet and cloth.

More than four notches may be used in the face of the twisting head ifdesired. While in Figs. 11, 12, l5 and 16 the twisting head is shown foroperative rotation in a counterclookwise direction, it is to beunderstood that it may be made for rotation in `a clockwise directionjust as well, if desired.

The staples may be of any shape in cross section desired, and will havetheir free ends preferably of unequal length and pointed so as tofacilitate convenient piercing of the material t0 which the button isbeing attached. I, however, do not wish to be limited thereto as otherforms may be used without departing from the spirit of my invention.

While I have shown for illustrative purposes my invention as applied tothe fastening of a button onto cloth or other supporting material, Iwish it understood that my invention may be used for the securingtogether of any two or more parts desired, to which it may be adaptable.Also, I wish it understood that the term wire staples as used hereinincludes not only bent metal staples Vbut also any head, base or thelike having legs attached thereto or protruding therefrom and which legsmay be of metal, or materials other than metal capable of retaining thelegs in their twisted formation.

Having now described my invention, I claim:

l. In a device for securing together a plurality of parts with twistedwire staples which parts when the securing operation is completedpresent on one side of one of the parts a closely compacted head oftwisted wire free of any outwardly projecting wire ends that would catchon extraneous objects, a twisting head having in its operative face aplurality of laterally extending grooves opening into a cavity formed inthe central portion of said face, said cavity having a closed inner endand being of a total depth from said face only slightly greater than thedepth of the grooves, said operative face being intended to bear againstthe adjacent one of said plurality of parts during the twistingoperation and the free ends of the wire staples moving inwardly alongthe trailing side walls of the notches into the cavity, the closed endand side walls of the cavity under pressure exerted on the twisting headas the latter rotates forming the wire ends into a compact rounded headfree of outwardly projecting wire ends, the projections deiining theside walls of the grooves being each undercut'on each side to positivelypick up the wires and guide them inwardly into the cavity when thetwisting head is rotated in either direction.

2. In a device for securing together a plurality of parts with twistedwire staples which parts when the securing operation is completedpresent on one side of one of the parts a closely compacted head oftwisted wire free of any outwardly projecting wire ends that would catchon extraneous objects, a twisting head having in its operative face aplurality of laterally extending grooves opening into a cavity formed inthe central portion of said face, said cavity having a closed inner endand being of a total depth from said face only slightly greater than thedepth of the grooves, said operative face being intended to bear againstthe adjacent one of said plurality of parts during the twistingoperation and the free ends of the wire staples moving inwardly alongthe trailing side walls of the notches into the cavity, the closed endand side walls of the cavity under pressure exerted on the twisting headas the latter rotates forming the wire ends into a compact rounded headfree of outwardly projecting wire ends, the trailing side walls of thegrooves being of reentrant inclined formation to counteract any tendencyfor the wires to leave the grooves.

3. In a device for securing together a plurality of parts with twistedwire staples which parts when the securing operation is completedpresent on one side of one of the parts a closely compacted head oftwisted wire free of any outwardly projecting wire ends that would catchon extraneous objects, a twisting head having in its operative face aplurality of laterally extending grooves opening into alcavity formed inthe central portion of said face, said cavity having a closed inner endand being of a total depth from said face only slightly greater than thedepth of the grooves, said operative face being intended to bear againstthe adjacent one of said plurality of parts during the twistingoperation and the free ends of the wire staples moving inwardly alongthe trailing side walls of the notches into the cavity, the closed endand side walls of the cavity under pressure exerted on the twisting headas the latter rotates forming the wire ends into a compact rounded headfree of outwardly projecting wire ends, the trailing side walls of thegrooves being substantially tangent to the circumference of the cavity.f

4. Apparatus for securing together a plurality of parts with wirestaples passing through the parts and the end portions of the wiresbeing twisted into a compact rounded head free of outwardly projectingwire ends, comprising a frame having a base member formed in the exposedface of its rear end portion with a noncircular socket, an arm memberhaving at its rear end a stem adapted to be removably seated in saidsocket, said stem having a portion corresponding in crosssection to thatof the socket to prevent lateral movement of the arm member when the noncircular part of the stem is seated in the nonciroular part of thesocket, said stem also having a cylindrical portion to enable lateralswinging movement of the arm when the stem is partly moved out of thesocket, said base member having an anvil on its end portion oppositefrom the socket, and said arm member having rotatably mounted in its endportion opposite from the stem a twisting head facing said anvil.

/VILLIAM E. DE WALD. REFERENCES CITED UNITED STATES PATENTS Number NameDate 1,497,339 McCann June 10, 1924 1,271,711 Horvath July 9, 19181,397,876 Meldal Nov. 22, 1921 1,163,085 Hardy Dec. 7, 1915 1,515,100Foster Nov. 11, 1924 424,423 Lanpher Mar. 25, 1890 444,808 Beals Jan.20, 1891 1,845,951 Worsham Feb. 16, 1932 173,141 Shorey Feb. 8, 18761,706,576 Karcsak Mar. 26, 1929 376,971 Tone Jan. 24, 1888 2,031,820Kuch Feb. 18, 1936 1,126,908. Stoeber Feb. 2, 1915 2,270,092 ThompsonJan. 13, 1942 FOREIGN PATENTS Number Country Date 333,868 Great BritainAug. 21, 1930 Certicate of Correction Patent N o. 2,425,031. August 5,1947.

` [SEAL] THOMAS F. MURPHY,

Assistant Uommz'ssz'oner of Patent.

